28878512825827 has 4 divisors (see below), whose sum is σ = 33004014658096. Its totient is φ = 24753010993560.

The previous prime is 28878512825803. The next prime is 28878512825839. The reversal of 28878512825827 is 72852821587882.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28878512825827 - 2⁴³ = 20082419803619 is a prime.

It is a super-3 number, since 3×28878512825827³ (a number of 41 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28878512825827.

It is not an unprimeable number, because it can be changed into a prime (28878512825527) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2062750916124 + ... + 2062750916137.

It is an arithmetic number, because the mean of its divisors is an integer number (8251003664524).

Almost surely, 2^{28878512825827} is an apocalyptic number.

28878512825827 is a deficient number, since it is larger than the sum of its proper divisors (4125501832269).

28878512825827 is an equidigital number, since it uses as much as digits as its factorization.

28878512825827 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4125501832268.

The product of its digits is 642252800, while the sum is 73.

The spelling of 28878512825827 in words is "twenty-eight trillion, eight hundred seventy-eight billion, five hundred twelve million, eight hundred twenty-five thousand, eight hundred twenty-seven".